1. Linear multiple objective problems with interval coefficients;Bitran;Management Sci.,1980
2. Infinitely constrained optimisation problem;Blankenship;J. Optim. Theory,1976
3. Reports on the workshop on the membership function;Dubois;BUSEFAL,1984
4. Fuzzy Sets and Systems;Dubois,1980
5. Multiple Objective Programming and Planning;Cohon,1978